Definition: You are given a question on computer security. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Encapsulating Security Payload (ESP) belongs to which Internet Security Protocol?
(A)Secure Socket Layer Protocol (B)Secure IP Protocol (C)Secure Http Protocol (D)Transport Layer Security Protocol

B